树干生长现象学,而不是树冠绿化,限制了叶树的生长
Matthias Arend1,2, Günter Hoch1, Ansgar Kahmen1
1Department of Environmental Sciences, Physiological Plant Ecology, University of Basel, Bernoullistrasse 32, Basel 4056, Switzerland.
Tree physiology
|December 30, 2023
概括
森林树冠的绿化和茎的生长没有密切联系,挑战生态系统模型. 单个树木的生长时间不同,更快的种植者更早开始和完成生长.
科学领域:
- 生态生态学 生态生态学
- 森林科学 森林科学 森林科学
- 植物生理学 植物生理学
背景情况:
- 树冠现象学是落叶森林生长的常见代理.
- 准确的生态系统建模依赖于树冠绿化和茎生长之间紧密协调的假设.
研究的目的:
- 研究树冠现象学和树叶树干生长之间的时间协调.
- 评估表现时间,生长时间和每年茎增量之间的关系.
主要方法:
- 对树冠和树干生长现象学以及每年树干增长的并行观察在90棵叶落树上进行.
- 数据收集了4年,在一个混合温带森林的不同天气条件下.
- 树木包括扩散多孔 (Fagus sylvatica,Acer pseudoplatanus,Carpinus betulus) 和环多孔 (Quercus robur × petraea) 的物种.
主要成果:
- 茎生长的恢复在扩散多孔树木中落后于树冠绿化数周,但在环多孔树木中并非如此.
- 多年来,树冠绿化和茎生长恢复之间的时间协调是微弱的或不存在的.
- 单个树木在茎生长时间上表现出显著的差异;生长速度更快的树木更早地开始和完成生长.
结论:
- 挑战了树冠和茎生长之间紧密的时间协调的假设.
- 较长时间的主生长活动不一定会导致较高的年度茎增量.
- 目前使用树冠现象学的生态系统建模方法可能需要重新评估.
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